Abstract
As part of the World Health Organization (WHO) symposia on pulmonary hypertension, experts from both clinical and basic science arenas recommended revision of the classification scheme for pulmonary hypertension. This scheme was designed to “individualize different categories sharing similarities in pathological mechanisms, clinical presentation and therapeutic options.” The diseases that comprise pulmonary arterial hypertension (PAH) were stratified in a manner consistent with current understanding of the pathobiological processes, facilitating discussion and the enrollment in clinical trials. However, these changes simultaneously highlight our lack of understanding regarding the basic pathological mechanisms underlying the development of PAH. For example, why do radically diverse conditions such as systemic lupus erythematosus, anorexigen exposure, and HIV-1 infection result in similar pathologic changes in the lung vasculature? Why does one individual with a connective tissue disease such as scleroderma develop pulmonary vascular disease whereas another develops pulmonary fibrosis? Why do patients with PAH associated with congenital cardiac shunts have better survival than patients with idiopathic PAH (IPAH)? Clearly, the pathogenesis of PAH is complex, involving multiple modulating genes and environmental factors. Such complexity lends itself to the use of microarray technology, allowing the efficient and accurate simultaneous expression measurement of thousands of genes. Gene microarray technology has most successfully been employed in the investigation of cancer, including hematologic malignancies, and in the classification of histologically indistinct tumor types with divergent natural histories. The power of this technology has recently been directed toward the study of PAH.
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Bull, T.M., Geraci, M.W. (2011). Genomic Applications to Study Pulmonary Hypertension. In: Yuan, JJ., Garcia, J., West, J., Hales, C., Rich, S., Archer, S. (eds) Textbook of Pulmonary Vascular Disease. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-87429-6_40
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